Pack of 25 highly absorbent filters, which can be placed in the bottom of any pipe bowl!
The Philtpads are rounded, white, chalk blocks, which are placed in the bottom of the pipe bowl before adding any tobacco. Ridges on 3 sides leave space round the edges for smoke to pass through, whilst absorbing impurities from the smoke and any moisture from the bottom of the bowl. They are mainly used by wet smokers who find they draw moisture through the stem.
No mess no fuss, when the filter turns a dark brown colour and looks full simply throw away and replace!